createFromStream<TParam, TResult> method

RxCommand<TParam, TResult> createFromStream <TParam, TResult>(StreamProvider<TParam, TResult> provider, { Observable<bool> canExecute, bool emitInitialCommandResult: false, bool emitLastResult: false, bool emitsLastValueToNewSubscriptions: false })

Creates a RxCommand from an "one time" observable. This is handy if used together with a streame generator function. provider: provider function that returns a new Observable that will be subscribed on the call of execute canExecute : observable that can bve used to enable/diable the command based on some other state change if omitted the command can be executed always except it's already executing isExecuting will issue a bool value on each state change. Even if you subscribe to a newly created command it will issue false emitLastResult will include the value of the last successful execution in all CommandResult events unless there is no new result. For the Observable<CommandResult> that RxCommand implement this normally doesn't make sense if you want to get an initial Result with data==null, error==null, isExceuting==false pass emitInitialCommandResult=true. By default the results Observable and the RxCommand itself behave like a PublishSubject. If you want that it acts like a BehaviourSubject, meaning every new listener gets the last received value, you can set emitsLastValueToNewSubscriptions = true.

Implementation

static RxCommand<TParam, TResult> createFromStream<TParam, TResult>(StreamProvider<TParam, TResult> provider,
    {Observable<bool> canExecute,
    bool emitInitialCommandResult = false,
    bool emitLastResult = false,
    bool emitsLastValueToNewSubscriptions = false}) {
  return new RxCommandStream<TParam, TResult>(
      provider, canExecute, emitInitialCommandResult, emitLastResult, emitsLastValueToNewSubscriptions);
}